<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <link rel="stylesheet" href="./css/bootstrap.min.css">
  <style>
    .red {
      color: red;
    }
  </style>
</head>

<body>
  <div id="app">
    <div class="container">
      <!-- 顶部搜索框模块 -->
      <div class="form-group">
        <div class="input-group">
          <h4>品牌管理</h4>
        </div>
      </div>

      <!-- 数据表格 -->
      <table class="table table-bordered table-hover mt-2">
        <thead>
          <tr>
            <th>编号</th>
            <th>资产名称</th>
            <th>价格</th>
            <th>创建时间</th>
            <th>操作</th>
          </tr>
        </thead>
        <tbody v-if="list.length">
          <tr v-for="(item, index) in list" :key="item.id">
            <td>{{ item.id }}</td>
            <td>{{ item.name }}</td>

            <!-- 如果价格超过100，就有red这个类 -->
            <td :class="{red : item.price > 100}">{{ item.price }}</td>
            <td>{{ item.time }}</td>
            <td><a href="#" @click.prevent="del(item.id)">删除</a></td>
          </tr>
          <tr style="background-color: #EEE">
              <td>统计:</td>
              <td colspan="2">总价钱为: {{ total }}</td>
              <td colspan="2">平均价: {{ total / list.length }}</td>
        </tr>
        </tbody>
        <tfoot v-else>
          <tr>
            <td colspan="5" style="text-align: center">暂无数据</td>
          </tr>
        </tfoot>
      </table>

      <!-- 添加资产 -->
      <form class="form-inline">
        <div class="form-group">
          <div class="input-group">
            <input v-model.trim="nickName" type="text" class="form-control" placeholder="资产名称" />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <div class="form-group">
          <div class="input-group">
            <input v-model.number="nickPrice" type="text" class="form-control" placeholder="价格" />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <!-- 阻止表单提交 -->
        <button @click.prevent="all" class="btn btn-primary">添加资产</button>
      </form>
    </div>
  </div>
  <script src="./vue.js"></script>
  <script>
    const list = [
          { id: 100, name: "外套", price: 199, time: new Date('2010-08-12') },
          { id: 101, name: "裤子", price: 34, time: new Date('2013-09-01') },
          { id: 102, name: "鞋", price: 25.4, time: new Date('2018-11-22') },
          { id: 103, name: "头发", price: 19900, time: new Date('2020-12-12') }
        ]
    const app = new Vue({
      el: '#app',
      data: {
        list:JSON.parse(localStorage.getItem('lists')) || list,
        nickName:'',
        nickPrice: ''
      },
      methods:{
        del(id){
            this.list=this.list.filter(item=>item.id!==id)
        },
        all(){
            if(!this.nickName || !this.nickPrice){
                alert('请输入资产名称和价格')
            }
            this.list.push({
                id:Math.floor(Math.random()*100000)+1,
                name:this.nickName,
                price:this.nickPrice,
                time:new Date()
            })
            this.nickName=''
            this.nickPrice=''
        }
      },
      computed:{
        total(){
            return this.list.reduce((pre,cur)=>pre+cur.price,0)
        }
      },
      watch:{
        list:{
            deep:true,
            handler(newVal){
                localStorage.setItem('lists',JSON.stringify(newVal))
            }
        }
      }

    })
  </script>


</body>

</html>